May I know what does it mean by "pressure containing parts"? And What does it mean by "pressure retaining parts"? What is the difference between "pressure containing parts" and "pressure retaining parts"? Very appreciate if anyone can help.
I am currently studying on sealing of ball valve. May I know when will we choose o-ring as sealing? and when will we choose plastic insert as sealing? and what is the diference between gasket and o-ring? thank you.
